The driving force is provided by differences in chemical potential, rather than by electric fields or pressure. Donnan potentials in aqueous phaseseparated polymer mixtures. That potential difference provides a driving force for proton transport in addition to the driving force provided by the difference in concentration of the free acid. Donnan dialysis generated by the difference between the activity of anions in the two solutions.
Pdf the thermodynamic equilibrium between charged colloids and an electrolyte reservoir is named after frederic donnan who first published on it one. One of the intriguing features of the donnan equilibrium is the ensuing osmotic. Further treatment of this system requires an understanding of electrochemical potentials lli which are described below. At a gibbsdonnan equilibrium, there will be an osmotic diffusion.
The gibbsdonnan nearequilibrium system of heart journal of. Gibbs donnan equilirbium, resting membrane potential. To change the order of your pdfs, drag and drop the files as you want. Viewed in this light, the system in heart, the nernst potentials of the various ions table vii, even though displaced from the. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Please, select more pdf files by clicking again on select pdf files. Simulating donnan equilibria based on the nernstplanck. Measurement of donnan potentials in gels by insitu. The net charge may be smaller or larger than the basic clay layer charge originating from isomorphic substitution, in response to a partial shielding or an addition of charges by more strongly bound surface ions. Combining the two approximations gives the following linearized. The ideal donnan potential of an ionized polyelectrolyte medium is shown to be an. Start studying gibbs donnan equilirbium, resting membrane potential.
Follow these steps to use adobe acrobat to combine or merge word, excel, powerpoint, audio, or video files, web pages, or existing pdfs. Gibbs donnan equilibrium and the membrane potential. That driving force is the donnan potential discussed in membrane separations. Donnan dialysis uses ion exchange membranes to extract and separate cations. Combine files into a single pdf, insert a pdf into another pdf, insert a clipboard selection into a pdf, or placeinsert a pdf as a link in another file. Rearrange individual pages or entire files in the desired order. Transport of ions in solution and across membranes the nsr. The membrane potential at rest is not governed solely by the nernst potentials of any.
These consequences were investigated in a number of papers by donnan and various coworkers 37. If this concentration is low, the second term vanishes, and eqs. Salt partitioning, for example, was carefully studied by donnan and harris 3 for solutions of congored the disodium salt of. Donnan membrane equilibrium, a form of osmotic pressure rela tionship. Combine or merge files into a single pdf, adobe acrobat dc. It is obtained from balancing the charge over the donnan porosity through 5. However, the donnan potentials in these systems are due to the addition of. Generation of membrane potential beyond the conceptual range of donnan theory and goldmanhodgkinkatz equation article pdf available in journal of biological physics 433. Strategies in the application of the donnan membrane technique article pdf available in environmental chemistry 85 december 2010 with 297 reads how we measure reads. Give your business a boost with the strategic digital marketing agency based in california. Measurement of donnan potentials in gels by insitu microelectrode article in journal of electroanalytical chemistry 5842.
862 803 1350 692 1520 116 1229 985 154 217 682 1230 1382 13 1287 312 894 547 225 1429 52 1170 1512 808 89 1494 1269 669 96 1193 869 517 77 578 244 999 278 534 681 136 124 68 1242 548 767 272 677